2. Academic Validation
  3. Substituted 2-iminopiperidines as inhibitors of human nitric oxide synthase isoforms

Substituted 2-iminopiperidines as inhibitors of human nitric oxide synthase isoforms

  • J Med Chem. 1998 Jan 1;41(1):96-101. doi: 10.1021/jm9705059.
R K Webber 1,  S Metz,  W M Moore,  J R Connor,  M G Currie,  K F Fok,  T J Hagen,  D W Hansen Jr,  G M Jerome,  P T Manning,  B S Pitzele,  M V Toth,  M Trivedi,  M E Zupec,  F S Tjoeng
Affiliations

Affiliation

  • 1 Department of Discovery Medicinal Chemistry, G. D. Searle Research and Development, Monsanto Company, St. Louis, Missouri 63198, USA.
PMID: 9438025 DOI: 10.1021/jm9705059
Abstract

A series of analogues of 2-iminopiperidine have been prepared and shown to be potent inhibitors of the human nitric oxide synthase (NOS) isoforms. Methyl substitutions on the 4-position (3) or 4- and 6-positions (8) afforded the most potent analogues. These compounds exhibited IC50 values of 0.1 and 0.08 microM, respectively, for hiNOS inhibition. Substitution with cyclohexylmethyl at the 6-position (13) afforded an inhibitor that showed the best selectivity for hiNOS versus heNOS (heNOS IC50/hiNOS IC50 = 64). Following oral administration, inhibitors were found to decrease serum nitrite/nitrate levels in an in vivo rat endotoxin assay. This series of 2-iminopiperidines were prepared via the described synthetic methodologies. The effect of ring substitutions on potency and selectivity for this class of cyclic amidines as NOS inhibitors is described.

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